Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

I hate to bring up a dead thread but I've just purchased a 2009 BMW 335d in Canada and I'm wondering if there is any good way to "Tune" it without having to remove and send away the ECU? I'm used to tuning my previous VW TDI with a OBII Based Loader.
Is something like that possible from Evolve or RENNtech?

I noticed Evolve has a "Switch" they talk about on their website. Has anyone used this?
(See below)

Our ECU upgrade for the 335d is now available worldwide with the introduction of our remapping unit which we send out to you and is connected directly to your OBDII port and allows us to remotely upgrade your car.
The Evolve Switch also allows you to return your car back to the standard setting when ever you wish and then go back to the tuned state. The write proceedure takes all but 5 mins.

Overview:
- Identical remap as above
- Option of 700Nm or 730Nm maps
- Switch to standard or tuned map within 5 mins
- Easy to use
- Available worldwide